Occlusion device

Abstract

The invention provides an occlusion device which adopts a net structure woven by shape memory wires, wherein the net structure comprises a columnar support part and at least one flow resisting disc, wherein the at least one flow resisting disc is connected with the support part through one columnar torsion part, the diameter of the torsion part is smaller than that of the support part and that of the at least one flow resisting disc, flow resisting membranes are arranged in the flow resisting disc and the support part, connecting joints are arranged on the outer end surface of the flow resisting disc or the support part, the net structure is formed by alternately weaving thick wires and fine wires, the thick wires are uniformly arranged in the perimeter direction of the net structure, and at least one fine wire is arranged between every two adjacent thick wires. The occlusion device is woven by combining the thick wires and the fine wires, the conveying effect is effectively guaranteed, and the memory rebound performance is guaranteed; and besides, the occlusion device can have a stretching effect to a certain extent, therefore, the device can be adjusted according to diseases and has good adaptability.

Description

technical field [0001] The invention relates to a medical device, in particular to a blocking device for a patent ductus arteriosus. Background technique [0002] Interventional therapy is a minimally invasive treatment using modern high-tech means, that is, under the guidance of medical imaging equipment, special catheters, guide wires and implanted medical devices are introduced into the human body to diagnose and locally treat lesions in the body . Implantable medical devices include occlusion devices, vena cava filters, coils, stents, etc. [0003] The occlusion device is a medical device used to treat atrial septal defect (ASD), ventricular septal defect (VSD), patent ductus arteriosus (PDA) and other diseases of structural heart disease. According to different diseases, the structure of the occlusion device is also different. Among them, the occlusion device usually used in patent ductus arteriosus (PDA) surgery is mainly composed of a cylindrical part and a disc, an...

AI Technical Summary

Problems solved by technology

However, due to the different shapes of patent ductus arteriosus defects, especially on the high-pressure side, the discs of traditional patent ductus arteriosus occlusion devices do not fit tightly with the defect, which affects the occlusion effect of the occlusion device; at the same time, The traditional occlusion device can only be placed into the defect from the side of the pulmonary artery. For children, the traditional occlusion device restricts the surgical path and causes trouble to the operation.

In order to solve the above problems, technicians proposed some solutions: 1. Use a delivery sheath with a smaller size to deliver the occlusion device, but this will affect the delivery effect, resulting in unsmooth delivery and increasing the operation time; 2. Use a delivery sheath with a larger diameter. A small nitinol wire braided occlusion device can be delivered in a small-sized sheath, but this will affect the memory rebound performance due to insufficient hardness, and cannot achieve a good effect of blocking blood

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